Results 11 to 20 of about 801,079 (211)
Gaoya dianqi, 2021 分体自冷式变压器内部温度场的仿真分析多基于二维仿真,缺乏对油流流场影响的分析。文中建立110 kV水平分体式油浸自冷变压器的三维全尺寸模型,采用有限元分析方法仿真变压器内部温度场和流速场的分布,研究变压器本体与散热器间的水平布置距离对温度场和流速场的影响,分析变压器流场和温度场的耦合关系,并采用短路法温升试验验证仿真结果的准确性。结果表明,变压器内部热点出现在低压绕组B相两侧距绕组底部约0.68 H处,热点温度达369.7 K。随着变压器本体与散热器间的水平布置距离的增大 ...
蒋惠中 +5 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Dielectric polymers commonly suffer from severe performance degradation above 150°C, hindering advanced power systems. Herein, we demonstrate a polyetherimide (PEI) nanocomposite that overcomes this by mimicking the gradient architecture of nacre and bamboo, incorporating a continuous vertical gradient of fluorinated boron nitride nanosheets ...
Jian Wang +8 more
wiley +1 more source
, 2013 利用CN 自由基B2Σ+→X2Σ+电子带系的发射光谱温度测量技术诊断模拟火星再入流场高温气体的温度。以双原子分子光谱理论为基础，通过确定CN 自由基B2Σ+→X2Σ+电子带系中Δv=0 振动带系发射光谱的跃迁波数、Einstein 跃迁几率以及不同振转能级粒子数等参数，得到了任意转动温度和振动温度下的理论光谱强度分布，结合经窄线宽半导体激光器标定的仪器展宽（Lorentz 线型，FWHM为0.154nm），为CN 自由基B2Σ+→X2Σ+电子带系发射光谱测温技术提供理论依据 ...
张新宇 +4 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
wiley +1 more source
Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller +29 more
wiley +1 more source
Gaoya dianqi, 2023 800 kV穿墙套管在特高压直流输电工程中发挥着重要的作用，但在应用有限元分析方法对其进行电场仿真优化设计时，往往忽略穿墙套管实际运行时的温度对电场分布的影响。文中首先建立了±800 k V穿墙套管三维仿真模型，通过仿真计算得到穿墙套管的温度场分布，考虑了实际运行中，套管发热对内部环氧芯体电导率的影响，并在温度场分布的基础上，应用电热耦合场分析计算的方法，获得穿墙套管的电场分布。计算结果表明：正常运行时，穿墙套管载流导杆及卷制管温度呈现中间高两边低的分布规律，靠近导杆的芯体温度高，沿径向方向 ...
韩晓东 +5 more
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High‐Brightness Delayed Imaging Realized by Embedding Zinc Gallate Nanocrystals Into Glass
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT X‐ray delayed imaging technology leverages an “irradiation‐storage‐thermally stimulated readout” mode, demonstrating unique advantages in intermittent monitoring scenarios such as high‐temperature/high‐radiation environments. This typically requires materials combining abundant carrier‐trapping energy levels with structural thermostability ...
Jun‐Xiao Wu +6 more
wiley +1 more source
Gaoya dianqi, 2019 温升是影响油浸式变压器正常运行的重要因素,为了得到变压器的温度场分布,提出一种基于混合方法的多物理场计算方法。对于油浸式变压器流体场和温度场的强耦合问题,混合方法考虑了温度对媒质物性参数的影响,采用迎风有限体积法和迎风有限元法依次计算流体场和温度场,即流体场和温度场依次循环求解,最终得到油浸式变压器启动过程瞬态温度场和稳态温度场。为了验证文中算法的有效性,采用换流变压器二维简化模型,分别采用文中方法和多物理场仿真软件Comsol计算了常温下的稳态温度场,计算结果验证了混合方法的准确性和有效性 ...
刘刚 +4 more
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Gaoya dianqi, 2023 文中分析了变压器温度流体场耦合数值仿真求解方法，基于互感器小模型的温度流体场计算确定了瞬态数值求解的时间步长和迭代步数，进而对一台S13-M-100kVA/10kV型油浸式变压器的三维温度流体场进行了瞬态数值仿真。与预埋光纤的变压器温升试验获得的绕组瞬态热点温度相比，变压器绕组瞬态热点温度数值仿真结果与试验结果最大偏差不超过3%，基于经验公式计算的热点温度平均相对偏差为9.8%，验证了文中变压器温度流体场仿真模型的有效性及准确性。
张健 +4 more
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Highly Anisotropic TbCo11Ti: Phase Evolution, Microstructure and Magnetic Properties
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Among the 1:12‐type compounds, TbCo11Ti stands out due to its high Curie temperature and pronounced magnetocrystalline anisotropy. However, its magnetic behavior at room temperature and its phase evolution process have not been clearly established.
Wei Chen +11 more
wiley +1 more source